Replace File with Concat in dependencies

Up to 2.0.0 concat was done as a define which contains File. Starting
from 2.0.0 concat::fragment define was rewritten as provider. This patch
replaces dependencies to File from concat::fragment with Concat to
enable concat ~> 2.0.0

Change-Id: Ifccc1bf2260dbbceb75b6bbe1d6b5bbbbb657a12

manifests/storage/account.pp

@@ -59,6 +59,6 @@ class swift::storage::account(
     config_file_name       => $config_file_name,
     service_provider       => $service_provider,
     require                => Package['swift-account'],
-    subscribe              => File["/etc/swift/${config_file_name}"],
+    subscribe              => Concat["/etc/swift/${config_file_name}"],
   }
 }

manifests/storage/container.pp

@@ -65,7 +65,7 @@ class swift::storage::container(
     config_file_name       => $config_file_name,
     service_provider       => $service_provider,
     require                => Package['swift-container'],
-    subscribe              => File["/etc/swift/${config_file_name}"],
+    subscribe              => Concat["/etc/swift/${config_file_name}"],
   }
 
   if $::osfamily == 'Debian' {
@@ -76,7 +76,7 @@ class swift::storage::container(
       config_file_name       => $config_file_name,
       service_provider       => $service_provider,
       require                => Package['swift-container'],
-      subscribe              => File["/etc/swift/${config_file_name}"],
+      subscribe              => Concat["/etc/swift/${config_file_name}"],
     }
     Swift_config<| |> ~> Service['swift-container-sync']
   }

manifests/storage/object.pp

@@ -59,6 +59,6 @@ class swift::storage::object(
     config_file_name       => $config_file_name,
     service_provider       => $service_provider,
     require                => Package['swift-object'],
-    subscribe              => File["/etc/swift/${config_file_name}"],
+    subscribe              => Concat["/etc/swift/${config_file_name}"],
   }
 }